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          搜索引擎搜索技巧
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        <h4 id="在某个网站或域名下搜索"><a href="#在某个网站或域名下搜索" class="headerlink" title="在某个网站或域名下搜索"></a>在某个网站或域名下搜索</h4><p>如<code>site:blog.csdn.net java</code>，在csdn的博客搜索java相关的信息；</p>
<h4 id="搜索某种类型的文件"><a href="#搜索某种类型的文件" class="headerlink" title="搜索某种类型的文件"></a>搜索某种类型的文件</h4><p>如<code>filetype:pdf python</code></p>
<blockquote>
<p>用来查找文献、电子书、PPT等非常有用</p>
<p>支持的文件类型：ppt, ppts, doc, docx, xlsx, xls, pdf, txt等等（不同的搜索引擎支持的文件类型不一样）</p>
</blockquote>
<span id="more"></span>
<h5 id="常见的域名"><a href="#常见的域名" class="headerlink" title="常见的域名"></a>常见的域名</h5><ul>
<li><code>.com</code> 国际通用顶级域名，也是目前使用最为广泛的域名，它后缀的含义代表商业组织机构；</li>
<li><code>.net</code> 国际通用域名，也是目前国际广泛流行的域名，后缀代表网络服务机构；</li>
<li><code>.cn</code> 中国国家级顶级域名，也是在国内广泛使用的域名，后缀表示含义为中国企业互联网标识；</li>
<li><code>.org</code> 国际顶级域名，是目前国际广泛使用的域名，后缀含义代表非盈利性组织；</li>
<li><code>.top</code> 国际顶级域名，作为目前最流行的最热闹的新型后缀域名，寓意为顶级排名、高端、突破，可以用于任何组织和个人。</li>
<li><code>.edu</code> 教育机构</li>
<li><code>.gov</code> 政府</li>
<li><code>.mil</code> 军事</li>
<li><code>.arts</code> 艺术机构</li>
<li><code>.firm</code> 商业公司</li>
<li><code>.info</code> 提供信息的机构</li>
</ul>
<h4 id="逻辑与、或：AND-OR"><a href="#逻辑与、或：AND-OR" class="headerlink" title="逻辑与、或：AND, OR"></a>逻辑与、或：AND, OR</h4><ul>
<li>注意 AND， OR必须大写，否则会被认为是普通的单词，而不是搜索指令</li>
<li>AND指令一般以空格代替，不明确写出。另外AND指令还可以用<code>+</code>替代</li>
<li>OR指令可用 <code>|</code> 代替</li>
</ul>
<h4 id="逻辑非："><a href="#逻辑非：" class="headerlink" title="逻辑非：-"></a>逻辑非：<code>-</code></h4><blockquote>
<p>逻辑非 - ，也就是减号，代表搜索不包含减号后面的词的页面。使用这个指令时减号前面必须是空格，减号后面没有空格，紧跟着需要排除的词。Google 和 baidu 都支持这个指令。</p>
</blockquote>
<h4 id="精确搜索：双引号"><a href="#精确搜索：双引号" class="headerlink" title="精确搜索：双引号"></a>精确搜索：双引号</h4><blockquote>
<p>把搜索词放在双引号中，代表完全匹配搜索，也就是说搜索结果返回的页面包含双引号中出现的所有的词，连顺序也必须完全匹配。bd和Google 都支持这个指令。</p>
</blockquote>
<h4 id="通配符：-和"><a href="#通配符：-和" class="headerlink" title="通配符：? 和 *"></a>通配符：<code>?</code> 和 <code>*</code></h4><ul>
<li><code>*</code>代表一连串字符，<code>?</code>代表单个字符</li>
</ul>
<h4 id="in指令：位置关键词查找"><a href="#in指令：位置关键词查找" class="headerlink" title="in指令：位置关键词查找"></a>in指令：位置关键词查找</h4><ul>
<li>intitle：在网页标题中查找</li>
<li>inurl：在网页的url地址中查找</li>
<li>inanchor:在网页的链接锚中查找</li>
<li>intext：在正文中检索</li>
</ul>
<h4 id="link：搜索所有链接到某个URL地址的网页"><a href="#link：搜索所有链接到某个URL地址的网页" class="headerlink" title="link：搜索所有链接到某个URL地址的网页"></a>link：搜索所有链接到某个URL地址的网页</h4><ul>
<li>最重要的用途：迅速判断一个网页的热度</li>
</ul>
<p>栗子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">link:www.newhua.com</span><br></pre></td></tr></table></figure>
<h4 id="related-寻找某网页的”类似网页”"><a href="#related-寻找某网页的”类似网页”" class="headerlink" title="related:寻找某网页的”类似网页”"></a>related:寻找某网页的”类似网页”</h4><p>栗子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">related:www.newhua.com</span><br></pre></td></tr></table></figure>
<h4 id="数值范围："><a href="#数值范围：" class="headerlink" title="数值范围：.."></a>数值范围：..</h4><ul>
<li>例如：数码相机 600..900 万像素 3000..4000 元</li>
<li>注意：“900”与“万”之间必须有空格。</li>
</ul>
<h4 id="从Google服务器上缓存页面中查询信息"><a href="#从Google服务器上缓存页面中查询信息" class="headerlink" title="从Google服务器上缓存页面中查询信息"></a>从Google服务器上缓存页面中查询信息</h4><p>“cache”用来搜索Google服务器上某页面的缓存，通常用于查找某些已经被删除的死链接网页。</p>
<p>栗子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">cache:www.yahoo.com.cn</span><br></pre></td></tr></table></figure>
<h4 id="info"><a href="#info" class="headerlink" title="info"></a>info</h4><p><code>info</code>用来显示与某链接相关的一系列搜索，提供cache、link、related和完全包含该链接的网页的功能。</p>
<p>栗子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">info:www.sina.com.cn</span><br></pre></td></tr></table></figure>
<h4 id="查单词，做翻译"><a href="#查单词，做翻译" class="headerlink" title="查单词，做翻译"></a>查单词，做翻译</h4><p>使用<code>define</code>指令</p>
<p>栗子：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">define:关键词</span><br></pre></td></tr></table></figure>
<h4 id="括号"><a href="#括号" class="headerlink" title="括号:()"></a>括号:<code>()</code></h4><p>用<code>()</code>来将多个术语或搜索运算符进行分组来控制搜索的执行方式。</p>
<h4 id><a href="#" class="headerlink" title=" "></a> </h4>
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